Oil burner fuel level control



April 23, 194s.- g, @RON 2,399,099

vOIL BURNER FUEL LEVEL CONTROL Filed' sept. 21, 194s v Chron,

u @I a j, AIITTORNEYS Patented Apr. 23, 1946 I Villa Caron, Millinocket, Maine-` Application September Zl, 1943, Serial No. 503,1991/2 3 Claims.

My invention relates to oil burners, and has among its objects and advantages the provision of a casing providing an improved float chamber interposed in the oil flow line to the burner to maintain the fuel oil at a predetermined level at a point adjacent the burner.

In the accompanying drawing:

Figure 1 is a vertical sectional view of a fioat chamber in accordance with my invention; and

Figure 2 is a sectional View taken along the line 2-2 of Figure 1.

In the embodiment selected for illustration, I make use of a casing I which may be mounted on a suitable support, such as a wall, through the medium of a. bracket I2. A fuel pipe I4 has communication with the casing at its bottom for conveying the fuel oil to the burner (not shown). Fuel from a source of supply is delivered into the casing through a pipe I6 connected with an elbow I8 threaded into a fitting 20 attached to the cover 22 of the casing I0.

The tting 20 is provided with a bore 24 in which is located a needle valve 26 having its tapered end 28 coacting with a valve seat 30 in one end of the elbow I8 to control the flow of fuel oil into the casing I0. Bore 24 terminates in a larger bore 32 for the reception of a body 34 at the lower end of the needle valve 26. A compression spring 36 is interposed between the body 34 and the shoulder 38 in the fitting 20 to yieldingly urge the needle valve downwardly and away from its seat 30.

A shank 40 is formed on the fitting 20 and is threaded through a boss 42 on the cover 22 to position the lower end of the shank inside the casing I0. A plug 44 is threaded into the bore 32 and is provided with an axial opening 46 shaped to slidably guide the body 34 but to permit passage of fuel oil therethrough when the needle valve is moved from its seat 30.

Underneath the body 34 is a link 48 engaging the rounded end 50 of the body 34, which link has one end pivotally connected at 52 with an arm 54 depending from the cover 22. The other end of the link 48 is pivotally connected at 56 with a link 58 having a pivotal connection 60 with a, float supporting link 62.

The iioat 64 is fixed to a vertical rod 66 having its upper end pivoted at 68 to one end of the oat link 62, the connection 60 being located intermediate the ends of the float link. The float link 62 has its other end pivoted at 'l0 to an arm 12 depending from the cover 22. In the extreme lowermost position of the iioat 64, as in Figure l, further downward movement of the floatis restrained by reason of engagement between a lug 'I4 on the link 58 and a lug/16 on the link 62.

To restrain the float 64 from lateral excursions inside the casing I0, the rod 66 extends loosely through an opening 18 in a plate or bottom wall of a tube 82 fitting loosely inside the upper end of the chamber I0. This tube is made secure by a ange 84 clamped between the flange 86 on the chamber I0 and the cover 22 through tightening of bolts 88 passing through openings in the cover and the flange 84 and threaded into the flange 86.

Openings 90 are provided in the plate 80 for the passage of fuel oil into the casing I0 from the tube 82. Oil owing through the openings 00 passes through a short tube 92 attached to the plate 80 and provided with a tapered length 94 terminating in a short tube 96. As the fuel oil rises to a predetermined level in the casing I0 and the tube 82, the float is lifted for elevating the needle valve 26 into engagement with the seat 30 to cut off the flow of oil into the tube 82. The spring 36 insures unseating of the needle valve 26 upon downward movement of the float.

A plug 88 is threaded into an opening |00 in a boss I02 on the cover 22. In lighting the burner, a stick having cloth tied thereto may be inserted through the opening |00 for dipping the cloth in the oil preparatory to lighting the burner. A handwheel |04 is secured to the plug 98 to facilitate handling thereof. A drain pipe |06 is secured to the bottom of the casing I0, which drain pipe may be controlled by a valve (not shown).

Without further elaboration, the foregoing will so fully illustrate my invention, that others may, by applying current knowledge, readily adapt the same for use under various conditions of service.

I claim:

1. An oil bumer fuel level control comprising a casing having a fuel outlet at its bottom for connection with an oil burner, a fuel inlet at the upper end of the casing and provided with a valve seat, a float guided for vertical movement inside said casing, a first link having one end pivotally connected with said fioat and its other end pivotally connected with the casing, a second link having one end pivotally connected with said first link and its other end pivotally connected with one end of a third link, the third link having its other end pivotally connected with said casing, and a valve member guided for vertical movementoand coacting with said valve seat to open and close said fuel inlet, said valve member being yieldingly biased against said second link to move away from the valve seat upon downward pivotal movement of said third link as the float descends in the casing but moved into engagement with the valve seat upon upward pivotal movement of said third link through elevation of the float by a rise in fuel oil level in the casing and opposed, cooperating lugs formed respectively on said first and second links and adapted to restrain the downward movement of the float.

2. The invention described in claim 1 wherein said casing` comprises a detachable cover constituting the top thereof and in which said cover is provided with two depending arms respectively constituting supports for said second and third links, and a tube like member having a. ange secured between said cover and the casing and depending inside the casing to restrain the float from relative lateral movement inside the casing. 3. The invention described in claim 1 wherein said casing comprises a cup-shaped member and a cover, a tube fitting loosely inside said member and having a flange secured between the cover and the member, said tube depending inside said member and being provided with a plate at its lower end located beneath said oat, said plate 'being open for the passage of fuel oil therethrough and having means to restrain Ythe oat from relative lateral movement with respect to the member, and a nozzle-like formation of diminishing diameter downwardly attached to said plate for receiving the fuel oil flowing through the plate. VILLA CARON. 

